Threads, cords, and fabrics



Patented Oct. 7,1930

UNITED STATES PATENT orrlca CHARLES PALMER AND STEPHEN MILLEB FULTON, OI SPONDON, NEAR DERBY. ENGLAND, ASSIGNORS TO CELANESE CORPORATION 01 AMERICA, A COB- PORATION OF DELAWARE THREADS, CORDS, AND FABRICS 1T0 Drawing. Application filed June 16, 1927, Serial No. 199,418, and in Great Britalh July 21, 1926.

It is known that when cellulose acetate artificial silk, especially dry-s un cellulose acetate artificial silk made rom cellulose acetate solutions of relatively low concen- 5 trations is exposed to the action of hot'aqueous media, such as hot or boiling solutionsof acids or acid salts, or hot water, and particularly water at from about 90 C. to the boiling point, or moist steam, the cellulose acetate artificial silk loses its natural high lustre to a greater or less extentand becomes converted to a more or less lustrelesscondition. r

The present invention consists of new orna 1 mental threads, cords and knitted, woven or other fabrics comprising both cellulose Bee'- tate yarns or threads which have been wholly or partially delustred by hot aqueous media and normal lustrous cellulose acetate yarns or threads. The new mixed threads may be doubled to produce cords, for example for knitting, or may be woven or knitted directly into new fabrics orgarments presenting a unique appearance due to the difference in v lustre, the eifects being enhanced by subsequent dyein as. hereinafter explained. Alternatively t e new fabrics may be knitted or woven from unmixed threads, though of course both types of thread the delustred and the normal lustrous, must be incorporated to produce the new fabrics. In this case any desired pattern eifect may be produced due to the difference in lustre and, even in the white," unique effects are obtainable, and the fabrics are eminently suitable for all purposes to which figured silk fabrics have in the past been applied. The new fabrics admit of cross-dyeing and are superior to known mixed fabrics, for example of cellulose ace- 40 tate silk and cotton, in a number of important properties, the chief of-wh1ch are feel and flexibility, Supe-rior feel or handle possesses obvlom' advantages, while the greater flexibility particularly noticeable in .45 the new fabrics which have been loosely woven, ofiers the same advantages to the wearer of articles made therefrom which have made knitted fabrics so popular in recent years. A convenient method of producing umformly delustred yarn from the normal lustrous yarn consists in the treatment of the latter on cop tubes, bobbins or the like, with wet steam at 100 C., the duration of the treatment being dependent on the degree of delustration required. 'However, it is to be understood of course that the invention is not limited to this method and that any suitable method of delustring may be employed.

It has been found that the ornamental effects of the white mixed threads, cords or fabrics of the present invention may be enhanced, and in some cases two-colour effects produced, by dyein or printing the threads, cords or fabrics. t is found that the portion of the new goods wholly or partially delustered by means'of ho aqueous media ossesses dyeing propertie towards most yestuifs appreciably different from those of the normal lustrous portion. This is especially the case when 1151 water soluble dyestuffs and more particular y basic dyestuffs, such as Capri blue. The aflinity of insoluble or relatively insoluble colours when applied in dispersed form for example by the methods described in' British specifications 219,349, 224,925, 242,393, 242,711, 269,960, 273,819

and 273,820 and the U. S. s ecifications corresponding respectively t ereto, namely, U. S. Patent 1,618,413, U. S. Patent 1,618,414, and U. S. applications Serial Nos. 50,525,

48,666,152517, 134,138 and 176,289 is not substantially affected by the delustring.

' The new mixed goods may be'dyed to produce broadly three different eifects, viz,

(1) By dyeing with an insoluble colour (solubilized by pre-treat'ment with a solubilizing agent), ornamental threads, cords, or fabrics are obtained showing the differential lustreefiect in substantially one shade;-

(2) By dyeing with a dyestuif such as Capri blue, the affinity of whichis markedly affected by the delustration, the eifect due to the difference in lustre is brought out in a still more striking fashion, owing to the fact that the lustrous parts are dyed, a deeper shade than the delustred parts;

(3) By utilizing methods (1) and (2) (that is to say by applying two dyestuffs, the one being a dyestuif the aflinity of which is 'litres of soft cold. water.

markedly affected by the delustring, while the other is a dyestuif whose aflinity is substantially unaffected, such as the insoluble colours referred to above), a-distinct two-colour ef feet is produced, the colour on the lustrous.

portion being due to the combined effect of the two dyestuffs, and that on the delustred portion to the insoluble colour, more or less shaded by the soluble colour. Thus the goods may first be dyed with the insoluble colour to produce a substantially solid shade over the whole, and then (1 ed with a dyestufi' such as Capri blue, whic is absorbed muchmore readily by the lustrous portion.

The new goods may also be printed in one, two or more colours, using either or both types of dyestuif above described according to the design required. Thus very elegant ef-.

understood that the examples are b no means exhaustive of the effects obtaina le by the present invention Emample 1.To dye 10 kilograms of the mixed lustrous and delustred cellulose acetate fabric an even shade of orange.

A boiling soap solution is poured on to 1 P kilogramof S. R; A. orange II standard paste whilst stirring. Thecolour solution is then added to a dyebath containing about 250 The goods are entered and the temperature raised during hour to 708 0 C. and dyeingcontinued for a further hour. The goods are then removed, rinsed in water at about C. and dried or otherwisefinished as desired.

Example 2.-To dye 10 kilograms of the mixed cellulose acetate fabric in differential shades of blue.

A dyebath of 300 litres is made up in the usual. manner with 0.2% of Capri blue reckoned on the weight of the goods and 1 cubic centimetre per litre of glacial acetic acid. p The goods are entered at about 0., the temperature raised gradually to 80 C. and

dyeing continued for 1 hour or until the required shade is produced. The goods, now

,dyed a. deep shade of blue on the lustrous portion and a very pale almost white shade on the delustred portion, are soaped, rinsed and dri dor otherwise finished.

Ewamle 3.--To dye 10 kilograms of the mixed cellulose acetate .11 violet grey shade on the lustrous portion and heliotrope on the delustred portion.

The fabric is first dyed with Capri blue as in Example 2, lifted, rinsed and entered at about 40 G. into a dyebath made up as Example 1 but using S. R. A. heliotrope I standard paste instead of S. R. A. orange II. 'The temperature is raised to about 80 C. during hour and dyeing continued for a further hour. The goods are lifted, rinsed and dried.

The term textile roducts used in the a pended claims is to e understood to include threads, cards and knitted, woven or other fabrics.

Whatwe claim and desire to secure by Letters Patent is 1. Textile products capable of yielding cross-dyed effects with basic dyes and of yielding solid color effects with dispersed insoluble colors, comprising cellulose acetate artificial silk capable of being delustered by hot aqueous media, part of which is at least partially so delustered and part of which has the normal lustre.

2. Textile products capable of yielding cross-dyed effects with basic dyes and of yield ing solid color effects with dispersed insoluble colors, comprising cellulose acetate artificial silk capable of being delustered by'hot aqueous media, part of which is so delustered and part of which has the normal lustre.

3. Fabrics capable of yielding cross-dyed effects with basic dyes and of yielding solid color effects with dispersed insoluble colors, comprising cellulose acetate artificial silk capable of being delustered by hot aqueous media, part of which is so delustered and art of which has the normal lustre.

4. Textile products comprising cellulose acetate artificial silk capable of being delustered by hot aqueous media, part of which is so delustered and part of which has the normal lustre, the products being cross-dyed by means of basis dyestuffs.

5. Textile products comprising cellulose acetate artificial silk capable of being delustered by hot aqueous media, part of which is so delustered and art of which has the normallustre, the pro ucts being cross-dyed by means of basic dyestuffs and colored with dis ersed relatively-insoluble colors.

11 testimony whereof we have hereunto subscribed our names. 

